Structural reorientation and compaction of porous MoS₂ coatings during wear testing
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In: Wear Volume 500-501 / (2022-04-02) , S. ; eissn:1873-2577
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Industrial upscaling frequently results in a different coating microstructure than the laboratory prototypes presented in the literature. Here, we investigate the wear behavior of physical vapor deposited (PVD) MoS2 coatings: A dense, nanocrystalline MoS2 coating, and a porous, prismatic-textured MoS2 coating. Transmission electron microscopy (TEM) investigations before and after wear testing evidence a crystallographic reorientation towards a basal texture in both samples. A basal texture is usually desirable due to its low-friction properties. This favorable reorientation is associated to a tribological compaction of the porous specimens. Following running-in, sliding under high contact pressure ultimately leads to a wear rate as small as for an ideal grown bulk MoS2 single crystal grown by chemical vapor deposition (CVD). This suggests that the imperfections of industrial grade MoS2 coatings can be remediated by a suitable pretreatment.
@article{doi:10.17170/kobra-202308018547,
author ={Krauß, Sebastian and Seynstahl, Armin and Tremmel, Stephan and Meyer, Bernd and Bitzek, Erik and Göken, Mathias and Yokosawa, Tadahiro and Zubiri, Benjamin Apeleo and Spiecker, Erdmann and Merle, Benoit},
title ={Structural reorientation and compaction of porous MoS₂ coatings during wear testing},
keywords ={600 and 660 and Molybdändisulfid and Tribologie and Verschleißprüfung and Durchstrahlungselektronenmikroskopie and Nanometerbereich},
copyright ={http://creativecommons.org/licenses/by/4.0/},
language ={en},
journal ={Wear},
year ={2022-04-02}
}